"""
读写JSON文件
"""
{
    "name": "riven",
    "age": 20,
    "qq": 1234567,
    "friends": ["王大锤", "白元芳"],
    "cars": [
        {"brand": "qqq", "max_speed": 180},
        {"brand": "aaa", "max_speed": 280},
        {"brand": "zzz", "max_speed": 320}
    ]
}